“NPK Levels and Application Methods on Productivity of Amorphophallus Muelleri Blume in Intercropping System”. Jurnal Jamu Indonesia 1, no. 2 (September 30, 2016): 47–54. Accessed January 22, 2025. https://jamu-journal.ipb.ac.id/index.php/JJI/article/view/12.